<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>分类管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 警告区域 -->
      <el-alert show-icon title="注意：只允许为第三级分类设置相关参数！" type="warning" :closable="false"></el-alert>

      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <!-- 选择商品分类的级联选择框 -->
          <el-cascader
            expand-trigger="hover"
            :options="cateList"
            :props="cateProps"
            v-model="selectedCateKeys"
            @change="handleChange"
            clearable
          ></el-cascader>
        </el-col>
      </el-row>

      <!-- tab页区域 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 添加动态参数 -->
        <el-tab-pane label="动态参数" name="1">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="addDisalogVisible=true"
          >添加参数</el-button>

          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环参数 -->
                <el-tag
                  v-for="(item,i) in scope.row.attr_values"
                  :key="i"
                  closable
                  @close="handleClose(i,scope.row)"
                >{{item}}</el-tag>
                <!-- 输入的文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <!-- 添加的按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                >+ New Tag</el-button>
              </template>
            </el-table-column>

            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.id)"
                >编辑</el-button>
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="remove(scope.row.id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>

        <!-- 添加静态属性 -->

        <el-tab-pane label="静态属性" name="2">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="addDisalogVisible=true"
          >添加属性</el-button>
          <!-- 静态参数表格 -->
          <el-table :data="onlyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环参数 -->
                <el-tag
                  v-for="(item,i) in scope.row.attr_values"
                  :key="i"
                  closable
                  @close="handleClose(i,scope.row)"
                >{{item}}</el-tag>
                <!-- 输入的文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <!-- 添加的按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                >+ New Tag</el-button>
              </template>
            </el-table-column>

            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.id)"
                >编辑</el-button>
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="remove(scope.row.id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>

    <!-- 添加参数对话框 -->
    <el-dialog
      :title="'添加'+titleText"
      :visible.sync="addDisalogVisible"
      width="50%"
      @close="addDisalogClosed"
    >
      <el-form ref="addFormRef" :model="addForm" label-width="80px" :rules="addFormRules">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDisalogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改参数对话框 -->
    <el-dialog
      :title="'修改'+titleText"
      :visible.sync="editDisalogVisible"
      width="50%"
      @close="editDisalogClosed"
    >
      <el-form ref="editFormRef" :model="editForm" label-width="80px" :rules="editFormRules">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDisalogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
import { server } from '../api/index'
export default {
  data() {
    return {
      //商品分类列表
      cateList: [],

      //指定级联选择器的配置对象
      cateProps: {
        value: 'id',
        label: 'name',
        children: 'children'
      },
      //选中的父级分类的Id数组
      selectedCateKeys: [],
      //被激活的页签的名称
      activeName: '1',
      //动态参数的数据
      manyTableData: [],
      //静态属性的数据
      onlyTableData: [],
      //对话框
      addDisalogVisible: false,
      //添加参数的表单数据对象
      addForm: {
        attr_name: ''
      },
      //添加表单的验证规则
      addFormRules: {
        attr_name: {
          required: true,
          message: '请输入参数名称',
          trigger: 'blur'
        }
      },
      //修改框
      editDisalogVisible: false,
      //修改的表单数据对象
      editForm: {},
      //修改表单的验证规则
      editFormRules: {
        attr_name: {
          required: true,
          message: '请输入参数名称',
          trigger: 'blur'
        }
      }
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await server.getCategoryList()
      if (res.code != 200) {
        return this.$message.error('获取分类列表失败')
      }
      this.cateList = res.data.data
      console.log(this.cateList)
    },
    //级联选择框中选项变化，会触发这个函数
    handleChange() {
      this.getParamsData()
    },
    //tab切换
    handleTabClick() {
      console.log(this.activeName)
      this.getParamsData()
    },
    //获取参数列表数据
    async getParamsData() {
      //证明选择的不是三级分类
      if (this.selectedCateKeys.length != 3) {
        this.selectedCateKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return
      }
      //证明选中的是三级

      const params = {
        sel: this.activeName
      }
      //根据所选分类的id和当前所处的面板，获取对应的参数
      const { data: res } = await server.getAttr(this.cateId, params)
      if (res.code !== 200) {
        return this.$message.error('获取参数列表失败！')
      }
      res.data.forEach(item => {
        item.attr_values = item.attr_values ? item.attr_values.split(',') : []
        //控制文本框的显示与隐藏
        item.inputVisible = false
        //文本框中输入的值
        item.inputValue = ''
      })
      console.log(res.data)

      if (this.activeName === '1') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    //关闭事件
    addDisalogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    //添加参数
    addParams() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const params = {
          type_id: this.cateId,
          attr_name: this.addForm.attr_name,
          attr_type: this.activeName
        }
        const { data: res } = await server.addAttr(params)
        if (res.code !== 200) {
          return this.$message.error('添加参数失败！')
        }
        this.$message.success('添加参数成功')
        this.addDisalogVisible = false
        this.getParamsData()
      })
    },
    //点击按钮展示修改对话框,请求详情接口
    async showEditDialog(id) {
      console.log(id)
      //查询当前参数的信息
      const { data: res } = await server.detailAttr(id)
      if (res.code !== 200) {
        return this.$message.error('获取参数信息失败')
      }
      this.editForm = res.data
      this.editDisalogVisible = true
    },
    //重置表单
    editDisalogClosed() {
      // this.$refs.editFormRef.resetFields()
    },
    //点击按钮，发送修改
    editParams() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const params = {
          attr_name: this.editForm.attr_name,
          attr_type: this.activeName
        }
        const { data: res } = await server.editAttr(this.editForm.id, params)
        if (res.code !== 200) {
          return this.$message.error('修改参数失败')
        }
        this.$message.success('修改参数成功')
        this.getParamsData()
        this.editDisalogVisible = false
      })
    },

    //删除
    remove(id) {
      this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      })
        .then(() => {
          this.delete(id)
        })
        .catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          })
        })
    },
    //文本框失去焦点或者按了回车,执行操作
    async handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      // 1 如果没有return证明输入的内容，需要执行操作
      row.attr_values.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      //需要发起请求，保存这次操作
      this.saveAttrValues(row)
    },
    // 2 执行删除values
    handleClose(i, row) {
      row.attr_values.splice(i, 1)
      this.saveAttrValues(row)
    },
    // 3 执行修改和删除attr_values
    async saveAttrValues(row) {
      const params = {
        attr_name: row.attr_name,
        attr_type: row.attr_type,
        attr_values: row.attr_values.join(',')
      }
      const { data: res } = await server.insertAttr(this.cateId, row.id, params)

      if (res.code != 200) {
        return this.$message.error('修改参数项失败！')
      }
      this.$message.success('修改参数项成功')
    },
    // 点击按钮显示文本输入框
    showInput(row) {
      row.inputVisible = true
      //让文本框自动获得焦点
      //$nextTick方法的作用，就是当页面上元素被重新渲染之后，才会指定回调函数中的代码
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    //执行删除操作
    async delete(id) {
      const { data: res } = await server.delAttr(id)

      if (res.code !== 200) {
        return this.$message.error('删除参数信息失败！')
      }
      //刷新列表
      this.getParamsData()
      this.$message.success('删除参数信息成功！')
    }
  },
  //计算属性
  computed: {
    //如果按钮需要被禁用，则返回true，否则返回false
    isBtnDisabled() {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    //当前选中的三级分类的id
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    titleText() {
      if (this.activeName == '1') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>
<style scoped>
.cat_opt {
  margin: 15px 0px;
}
.el-tag {
  margin: 10px;
}
.input-new-tag {
  width: 120px;
}
</style>